Apparatus for disinfecting water; Aquarium filtration apparatus; Book sterilisation apparatus; Book sterilization apparatus; Dish sterilizers; Disinfectant apparatus for medical purposes; Disinfectant dispensers for toilets; Electric air deodorizing apparatus; Electric kettles; Filters for drinking water; Gas scrubbing apparatus; Magnetic water treatment apparatus; Purification installations for sewage; Septic tanks; Sewage purification installations; Sewage treatment plants; Swimming pool ch...